1. What is a Sand and Cement Calculator for Walls?

Definition: This calculator estimates the volume of mortar needed for wall plastering based on wall area, plaster thickness, cement-sand ratio, and yield per bag.

Purpose: It helps construction professionals and DIYers determine how much sand and cement is required for wall plastering projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( M \) — Mortar volume (cubic feet)
• \( A \) — Wall area (square feet)
• \( T \) — Plaster thickness (inches)
• \( R \) — Cement to sand ratio (unitless)
• \( Y \) — Yield per bag of cement (cubic feet per bag)

Explanation: The wall area is multiplied by thickness (converted to feet) and ratio, then divided by yield to determine required mortar volume.

3. Importance of Mortar Calculation

Details: Accurate mortar volume estimation ensures proper material purchasing, minimizes waste, and guarantees sufficient material for complete coverage.

4. Using the Calculator

Tips: Enter wall area in square feet, plaster thickness in inches (default 0.5"), cement-sand ratio (default 1:4 as 0.25), and yield per bag (default 1.25 ft³/bag). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine the cement-sand ratio?
A: Common ratios are 1:3 (rich mix) to 1:6 (lean mix). Enter as decimal (1:4 = 0.25).

Q2: What's a typical plaster thickness?
A: Interior walls: 0.5", Exterior walls: 0.75"-1", but consult local building codes.

Q3: How do I find the yield per bag?
A: Check cement bag specifications - typically 1.25 ft³ per 50kg bag for 1:4 mix.

Q4: Does this include wastage?
A: No, add 5-10% extra to account for spillage and uneven surfaces.

Q5: How do I convert to number of cement bags?
A: Divide total mortar volume by yield per bag and round up to whole bags.